角的度量

GeoGebra 命令及参数

1. Point(yAxis) → A
2. Circle((0, 0), A) → c
3. Point(c) → B
4. Circle(D, abs(y(A)) + 0.75) → d
5. Ray(D, B) → e
6. Intersect(d, e, 1) → F
7. Segment(D, F) → b
8. CircleArc(D, C, B) → f
9. Textfield(NumU) → InputBox1
10. Angle(C, D, B) → α
11. Sequence(((abs(y(A)) * cos(((i * 2) * π / NumU))), (abs(y(A)) * sin(((i * 2) * π / NumU)))), i, 0, NumU) → list1
12. Sequence(Segment[(((abs(y(A)) + 0.5) * cos(((i * 2) * π / NumU))), ((abs(y(A)) + 0.5) * sin(((i * 2) * π / NumU)))), (((abs(y(A)) - 0.5) * cos(((i * 2) * π / NumU))), ((abs(y(A)) - 0.5) * sin(((i * 2) * π / NumU))))], i, 0, NumU) → list2
13. Segment(D, E) → a